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2022-05-25ocfs2: dlmfs: don't clear USER_LOCK_ATTACHED when destroying lockJunxiao Bi1-1/+0
The following function is the only place that checks USER_LOCK_ATTACHED. This flag is set when lock request is granted through user_ast() and only the following function will clear it. Checking of this flag here is to make sure ocfs2_dlm_unlock is not issued if this lock is never granted. For example, lock file is created and then get removed, open file never happens. Clearing the flag here is not necessary because this is the only function that checks it, if another flow is executing user_dlm_destroy_lock(), it will bail out at the beginning because of USER_LOCK_IN_TEARDOWN and never check USER_LOCK_ATTACHED. Drop the clear, so we don't need take care of it for the following error handling patch. int user_dlm_destroy_lock(struct user_lock_res *lockres) { ... status = 0; if (!(lockres->l_flags & USER_LOCK_ATTACHED)) { spin_unlock(&lockres->l_lock); goto bail; } lockres->l_flags &= ~USER_LOCK_ATTACHED; lockres->l_flags |= USER_LOCK_BUSY; spin_unlock(&lockres->l_lock); status = ocfs2_dlm_unlock(conn, &lockres->l_lksb, DLM_LKF_VALBLK); if (status) { user_log_dlm_error("ocfs2_dlm_unlock", status, lockres); goto bail; } ... } V1 discussion with Joseph: https://lore.kernel.org/all/7b620c53-0c45-da2c-829e-26195cbe7d4e@linux.alibaba.com/T/ Link: https://lkml.kernel.org/r/20220518235224.87100-1-junxiao.bi@oracle.com Signed-off-by: Junxiao Bi <junxiao.bi@oracle.com> Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com> Cc: Mark Fasheh <mark@fasheh.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Changwei Ge <gechangwei@live.cn> Cc: Gang He <ghe@suse.com> Cc: Jun Piao <piaojun@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2022-05-25Merge tag 'net-next-5.19' of ↵Linus Torvalds1930-59867/+162302
git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next Pull networking updates from Jakub Kicinski: "Core ---- - Support TCPv6 segmentation offload with super-segments larger than 64k bytes using the IPv6 Jumbogram extension header (AKA BIG TCP). - Generalize skb freeing deferral to per-cpu lists, instead of per-socket lists. - Add a netdev statistic for packets dropped due to L2 address mismatch (rx_otherhost_dropped). - Continue work annotating skb drop reasons. - Accept alternative netdev names (ALT_IFNAME) in more netlink requests. - Add VLAN support for AF_PACKET SOCK_RAW GSO. - Allow receiving skb mark from the socket as a cmsg. - Enable memcg accounting for veth queues, sysctl tables and IPv6. BPF --- - Add libbpf support for User Statically-Defined Tracing (USDTs). - Speed up symbol resolution for kprobes multi-link attachments. - Support storing typed pointers to referenced and unreferenced objects in BPF maps. - Add support for BPF link iterator. - Introduce access to remote CPU map elements in BPF per-cpu map. - Allow middle-of-the-road settings for the kernel.unprivileged_bpf_disabled sysctl. - Implement basic types of dynamic pointers e.g. to allow for dynamically sized ringbuf reservations without extra memory copies. Protocols --------- - Retire port only listening_hash table, add a second bind table hashed by port and address. Avoid linear list walk when binding to very popular ports (e.g. 443). - Add bridge FDB bulk flush filtering support allowing user space to remove all FDB entries matching a condition. - Introduce accept_unsolicited_na sysctl for IPv6 to implement router-side changes for RFC9131. - Support for MPTCP path manager in user space. - Add MPTCP support for fallback to regular TCP for connections that have never connected additional subflows or transmitted out-of-sequence data (partial support for RFC8684 fallback). - Avoid races in MPTCP-level window tracking, stabilize and improve throughput. - Support lockless operation of GRE tunnels with seq numbers enabled. - WiFi support for host based BSS color collision detection. - Add support for SO_TXTIME/SCM_TXTIME on CAN sockets. - Support transmission w/o flow control in CAN ISOTP (ISO 15765-2). - Support zero-copy Tx with TLS 1.2 crypto offload (sendfile). - Allow matching on the number of VLAN tags via tc-flower. - Add tracepoint for tcp_set_ca_state(). Driver API ---------- - Improve error reporting from classifier and action offload. - Add support for listing line cards in switches (devlink). - Add helpers for reporting page pool statistics with ethtool -S. - Add support for reading clock cycles when using PTP virtual clocks, instead of having the driver convert to time before reporting. This makes it possible to report time from different vclocks. - Support configuring low-latency Tx descriptor push via ethtool. - Separate Clause 22 and Clause 45 MDIO accesses more explicitly. New hardware / drivers ---------------------- - Ethernet: - Marvell's Octeon NIC PCI Endpoint support (octeon_ep) - Sunplus SP7021 SoC (sp7021_emac) - Add support for Renesas RZ/V2M (in ravb) - Add support for MediaTek mt7986 switches (in mtk_eth_soc) - Ethernet PHYs: - ADIN1100 industrial PHYs (w/ 10BASE-T1L and SQI reporting) - TI DP83TD510 PHY - Microchip LAN8742/LAN88xx PHYs - WiFi: - Driver for pureLiFi X, XL, XC devices (plfxlc) - Driver for Silicon Labs devices (wfx) - Support for WCN6750 (in ath11k) - Support Realtek 8852ce devices (in rtw89) - Mobile: - MediaTek T700 modems (Intel 5G 5000 M.2 cards) - CAN: - ctucanfd: add support for CTU CAN FD open-source IP core from Czech Technical University in Prague Drivers ------- - Delete a number of old drivers still using virt_to_bus(). - Ethernet NICs: - intel: support TSO on tunnels MPLS - broadcom: support multi-buffer XDP - nfp: support VF rate limiting - sfc: use hardware tx timestamps for more than PTP - mlx5: multi-port eswitch support - hyper-v: add support for XDP_REDIRECT - atlantic: XDP support (including multi-buffer) - macb: improve real-time perf by deferring Tx processing to NAPI - High-speed Ethernet switches: - mlxsw: implement basic line card information querying - prestera: add support for traffic policing on ingress and egress - Embedded Ethernet switches: - lan966x: add support for packet DMA (FDMA) - lan966x: add support for PTP programmable pins - ti: cpsw_new: enable bc/mc storm prevention - Qualcomm 802.11ax WiFi (ath11k): - Wake-on-WLAN support for QCA6390 and WCN6855 - device recovery (firmware restart) support - support setting Specific Absorption Rate (SAR) for WCN6855 - read country code from SMBIOS for WCN6855/QCA6390 - enable keep-alive during WoWLAN suspend - implement remain-on-channel support - MediaTek WiFi (mt76): - support Wireless Ethernet Dispatch offloading packet movement between the Ethernet switch and WiFi interfaces - non-standard VHT MCS10-11 support - mt7921 AP mode support - mt7921 IPv6 NS offload support - Ethernet PHYs: - micrel: ksz9031/ksz9131: cabletest support - lan87xx: SQI support for T1 PHYs - lan937x: add interrupt support for link detection" * tag 'net-next-5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1809 commits) ptp: ocp: Add firmware header checks ptp: ocp: fix PPS source selector debugfs reporting ptp: ocp: add .init function for sma_op vector ptp: ocp: vectorize the sma accessor functions ptp: ocp: constify selectors ptp: ocp: parameterize input/output sma selectors ptp: ocp: revise firmware display ptp: ocp: add Celestica timecard PCI ids ptp: ocp: Remove #ifdefs around PCI IDs ptp: ocp: 32-bit fixups for pci start address Revert "net/smc: fix listen processing for SMC-Rv2" ath6kl: Use cc-disable-warning to disable -Wdangling-pointer selftests/bpf: Dynptr tests bpf: Add dynptr data slices bpf: Add bpf_dynptr_read and bpf_dynptr_write bpf: Dynptr support for ring buffers bpf: Add bpf_dynptr_from_mem for local dynptrs bpf: Add verifier support for dynptrs bpf: Suppress 'passing zero to PTR_ERR' warning bpf: Introduce bpf_arch_text_invalidate for bpf_prog_pack ...
2022-05-25Merge branch 'for-5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wqLinus Torvalds1-1/+1
Pull workqueue update from Tejun Heo: "A lone commit fixing CPU offline handling for per-cpu wq workers so that they don't bother isolated CPUs" * 'for-5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq: workqueue: Restrict kworker in the offline CPU pool running on housekeeping CPUs
2022-05-25Merge branch 'for-5.19' of ↵Linus Torvalds9-4/+756
git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup Pull cgroup updates from Tejun Heo: "Nothing too interesting. This adds cpu controller selftests and there are a couple code cleanup patches" * 'for-5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup: cgroup: remove the superfluous judgment cgroup: Make cgroup_debug static kseltest/cgroup: Make test_stress.sh work if run interactively kselftest/cgroup: fix test_stress.sh to use OUTPUT dir cgroup: Add config file to cgroup selftest suite cgroup: Add test_cpucg_max_nested() testcase cgroup: Add test_cpucg_max() testcase cgroup: Add test_cpucg_nested_weight_underprovisioned() testcase cgroup: Adding test_cpucg_nested_weight_overprovisioned() testcase cgroup: Add test_cpucg_weight_underprovisioned() testcase cgroup: Add test_cpucg_weight_overprovisioned() testcase cgroup: Add test_cpucg_stats() testcase to cgroup cpu selftests cgroup: Add new test_cpu.c test suite in cgroup selftests
2022-05-25Merge tag 'linux-kselftest-kunit-5.19-rc1' of ↵Linus Torvalds43-891/+1499
git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest Pull KUnit updates from Shuah Khan: "Several fixes, cleanups, and enhancements to tests and framework: - introduce _NULL and _NOT_NULL macros to pointer error checks - rework kunit_resource allocation policy to fix memory leaks when caller doesn't specify free() function to be used when allocating memory using kunit_add_resource() and kunit_alloc_resource() funcs. - add ability to specify suite-level init and exit functions" * tag 'linux-kselftest-kunit-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (41 commits) kunit: tool: Use qemu-system-i386 for i386 runs kunit: fix executor OOM error handling logic on non-UML kunit: tool: update riscv QEMU config with new serial dependency kcsan: test: use new suite_{init,exit} support kunit: tool: Add list of all valid test configs on UML kunit: take `kunit_assert` as `const` kunit: tool: misc cleanups kunit: tool: minor cosmetic cleanups in kunit_parser.py kunit: tool: make parser stop overwriting status of suites w/ no_tests kunit: tool: remove dead parse_crash_in_log() logic kunit: tool: print clearer error message when there's no TAP output kunit: tool: stop using a shell to run kernel under QEMU kunit: tool: update test counts summary line format kunit: bail out of test filtering logic quicker if OOM lib/Kconfig.debug: change KUnit tests to default to KUNIT_ALL_TESTS kunit: Rework kunit_resource allocation policy kunit: fix debugfs code to use enum kunit_status, not bool kfence: test: use new suite_{init/exit} support, add .kunitconfig kunit: add ability to specify suite-level init and exit functions kunit: rename print_subtest_{start,end} for clarity (s/subtest/suite) ...
2022-05-25Merge tag 'linux-kselftest-next-5.19-rc1' of ↵Linus Torvalds19-94/+124
git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest Pull Kselftest updates from Shuah Khan: "Several fixes, cleanups, and enhancements to tests: - add mips support for kprobe args string and syntax tests - updates to resctrl test to use kselftest framework - fixes, cleanups, and enhancements to tests" * tag 'linux-kselftest-next-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: kselftests/ir : Improve readability of modprobe error message selftests/resctrl: Fix null pointer dereference on open failed selftests/resctrl: Add missing SPDX license to Makefile selftests/resctrl: Update README about using kselftest framework to build/run resctrl_tests selftests/resctrl: Make resctrl_tests run using kselftest framework selftests/resctrl: Fix resctrl_tests' return code to work with selftest framework selftests/resctrl: Change the default limited time to 120 seconds selftests/resctrl: Kill child process before parent process terminates if SIGTERM is received selftests/resctrl: Print a message if the result of MBM&CMT tests is failed on Intel CPU selftests/resctrl: Extend CPU vendor detection selftests/x86/corrupt_xstate_header: Use provided __cpuid_count() macro selftests/x86/amx: Use provided __cpuid_count() macro selftests/vm/pkeys: Use provided __cpuid_count() macro selftests: Provide local define of __cpuid_count() selftests/damon: add damon to selftests root Makefile selftests/binderfs: Improve message to provide more info selftests: mqueue: drop duplicate min definition selftests/ftrace: add mips support for kprobe args syntax tests selftests/ftrace: add mips support for kprobe args string tests
2022-05-25Merge tag 'docs-5.19' of git://git.lwn.net/linuxLinus Torvalds88-1977/+3571
Pull documentation updates from Jonathan Corbet: "It was a moderately busy cycle for documentation; highlights include: - After a long period of inactivity, the Japanese translations are seeing some much-needed maintenance and updating. - Reworked IOMMU documentation - Some new documentation for static-analysis tools - A new overall structure for the memory-management documentation. This is an LSFMM outcome that, it is hoped, will help encourage developers to fill in the many gaps. Optimism is eternal...but hopefully it will work. - More Chinese translations. Plus the usual typo fixes, updates, etc" * tag 'docs-5.19' of git://git.lwn.net/linux: (70 commits) docs: pdfdocs: Add space for chapter counts >= 100 in TOC docs/zh_CN: Add dev-tools/gdb-kernel-debugging.rst Chinese translation input: Docs: correct ntrig.rst typo input: Docs: correct atarikbd.rst typos MAINTAINERS: Become the docs/zh_CN maintainer docs/zh_CN: fix devicetree usage-model translation mm,doc: Add new documentation structure Documentation: drop more IDE boot options and ide-cd.rst Documentation/process: use scripts/get_maintainer.pl on patches MAINTAINERS: Add entry for DOCUMENTATION/JAPANESE docs/trans/ja_JP/howto: Don't mention specific kernel versions docs/ja_JP/SubmittingPatches: Request summaries for commit references docs/ja_JP/SubmittingPatches: Add Suggested-by as a standard signature docs/ja_JP/SubmittingPatches: Randy has moved docs/ja_JP/SubmittingPatches: Suggest the use of scripts/get_maintainer.pl docs/ja_JP/SubmittingPatches: Update GregKH links Documentation/sysctl: document max_rcu_stall_to_panic Documentation: add missing angle bracket in cgroup-v2 doc Documentation: dev-tools: use literal block instead of code-block docs/zh_CN: add vm numa translation ...
2022-05-25mm: kfence: use PAGE_ALIGNED helperKefeng Wang1-3/+2
Use PAGE_ALIGNED macro instead of IS_ALIGNED and passing PAGE_SIZE. Link: https://lkml.kernel.org/r/20220520021833.121405-1-wangkefeng.wang@huawei.com Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> Acked-by: Muchun Song <songmuchun@bytedance.com> Cc: Marco Elver <elver@google.com> Cc: Alexander Potapenko <glider@google.com> Cc: Dmitry Vyukov <dvyukov@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2022-05-25selftests: vm: add the "settings" file with timeout variablePatrick Wang1-0/+1
The default "timeout" for one kselftest is 45 seconds, while some cases in run_vmtests.sh require more time. This will cause testing timeout like: not ok 4 selftests: vm: run_vmtests.sh # TIMEOUT 45 seconds Therefore, add the "settings" file with timeout variable so users can set the "timeout" value. Link: https://lkml.kernel.org/r/20220521083825.319654-4-patrick.wang.shcn@gmail.com Signed-off-by: Patrick Wang <patrick.wang.shcn@gmail.com> Cc: Shuah Khan <shuah@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2022-05-25selftests: vm: add "test_hmm.sh" to TEST_FILESPatrick Wang1-0/+1
The "test_hmm.sh" file used by run_vmtests.sh dose not be installed into INSTALL_PATH. Thus run_vmtests.sh can not call it in INSTALL_PATH: --------------------------- running ./test_hmm.sh smoke --------------------------- ./run_vmtests.sh: line 74: ./test_hmm.sh: No such file or directory [FAIL] ----------------------- Add "test_hmm.sh" to TEST_FILES so that it will be installed. Link: https://lkml.kernel.org/r/20220521083825.319654-3-patrick.wang.shcn@gmail.com Signed-off-by: Patrick Wang <patrick.wang.shcn@gmail.com> Cc: Shuah Khan <shuah@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2022-05-25selftests: vm: check numa_available() before operating "merge_across_nodes" ↵Patrick Wang1-3/+6
in ksm_tests Patch series "selftests: vm: a few fixup patches". This series contains three fixup patches for vm selftests. They are independent. Please see the patches. This patch (of 3): Currently, ksm_tests operates "merge_across_nodes" with NUMA either enabled or disabled. In a system with NUMA disabled, these operations will fail and output a misleading report given "merge_across_nodes" does not exist in sysfs: ---------------------------- running ./ksm_tests -M -p 10 ---------------------------- f /sys/kernel/mm/ksm/merge_across_nodes fopen: No such file or directory Cannot save default tunables [FAIL] ---------------------- So check numa_available() before those operations to skip them if NUMA is disabled. Link: https://lkml.kernel.org/r/20220521083825.319654-1-patrick.wang.shcn@gmail.com Link: https://lkml.kernel.org/r/20220521083825.319654-2-patrick.wang.shcn@gmail.com Signed-off-by: Patrick Wang <patrick.wang.shcn@gmail.com> Cc: Shuah Khan <shuah@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2022-05-25selftests: vm: add migration to the .gitignoreMuhammad Usama Anjum1-0/+1
Add newly added migration test object to .gitignore file. Link: https://lkml.kernel.org/r/20220521094313.166505-1-usama.anjum@collabora.com Fixes: 0c2d08728470 ("mm: add selftests for migration entries") Signed-off-by: Muhammad Usama Anjum <usama.anjum@collabora.com> Reviewed-by: Alistair Popple <apopple@nvidia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2022-05-25selftests/vm/pkeys: fix typo in commentJulia Lawall1-1/+1
Spelling mistake (triple letters) in comment. Detected with the help of Coccinelle. Link: https://lkml.kernel.org/r/20220521111145.81697-80-Julia.Lawall@inria.fr Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr> Reviewed-by: Muchun Song <songmuchun@bytedance.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2022-05-25ksm: fix typo in commentJulia Lawall1-1/+1
Spelling mistake (triple letters) in comment. Detected with the help of Coccinelle. Link: https://lkml.kernel.org/r/20220521111145.81697-94-Julia.Lawall@inria.fr Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr> Reviewed-by: Muchun Song <songmuchun@bytedance.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2022-05-25selftests: vm: add process_mrelease testsSuren Baghdasaryan4-0/+204
Introduce process_mrelease syscall sanity tests which include tests which expect to fail: - process_mrelease with invalid pidfd and flags inputs - process_mrelease on a live process with no pending signals and valid process_mrelease usage which is expected to succeed. Because process_mrelease has to be used against a process with a pending SIGKILL, it's possible that the process exits before process_mrelease gets called. In such cases we retry the test with a victim that allocates twice more memory up to 1GB. This would require the victim process to spend more time during exit and process_mrelease has a better chance of catching the process before it exits and succeeding. On success the test reports the amount of memory the child had to allocate for reaping to succeed. Sample output: $ mrelease_test Success reaping a child with 1MB of memory allocations On failure the test reports the failure. Sample outputs: $ mrelease_test All process_mrelease attempts failed! $ mrelease_test process_mrelease: Invalid argument Link: https://lkml.kernel.org/r/20220518204316.13131-1-surenb@google.com Signed-off-by: Suren Baghdasaryan <surenb@google.com> Reviewed-by: Shuah Khan <skhan@linuxfoundation.org> Acked-by: Christian Brauner (Microsoft) <brauner@kernel.org> Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com> Cc: Michal Hocko <mhocko@suse.com> Cc: David Rientjes <rientjes@google.com> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Roman Gushchin <guro@fb.com> Cc: Minchan Kim <minchan@kernel.org> Cc: "Kirill A . Shutemov" <kirill@shutemov.name> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: David Hildenbrand <david@redhat.com> Cc: Jann Horn <jannh@google.com> Cc: Shakeel Butt <shakeelb@google.com> Cc: Peter Xu <peterx@redhat.com> Cc: John Hubbard <jhubbard@nvidia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2022-05-25Revert "mm/vmscan: never demote for memcg reclaim"Johannes Weiner1-7/+2
This reverts commit 3a235693d3930e1276c8d9cc0ca5807ef292cf0a. Its premise was that cgroup reclaim cares about freeing memory inside the cgroup, and demotion just moves them around within the cgroup limit. Hence, pages from toptier nodes should be reclaimed directly. However, with NUMA balancing now doing tier promotions, demotion is part of the page aging process. Global reclaim demotes the coldest toptier pages to secondary memory, where their life continues and from which they have a chance to get promoted back. Essentially, tiered memory systems have an LRU order that spans multiple nodes. When cgroup reclaims pages coming off the toptier directly, there can be colder pages on lower tier nodes that were demoted by global reclaim. This is an aging inversion, not unlike if cgroups were to reclaim directly from the active lists while there are inactive pages. Proactive reclaim is another factor. The goal of that it is to offload colder pages from expensive RAM to cheaper storage. When lower tier memory is available as an intermediate layer, we want offloading to take advantage of it instead of bypassing to storage. Revert the patch so that cgroups respect the LRU order spanning the memory hierarchy. Of note is a specific undercommit scenario, where all cgroup limits in the system add up to <= available toptier memory. In that case, shuffling pages out to lower tiers first to reclaim them from there is inefficient. This is something could be optimized/short-circuited later on (although care must be taken not to accidentally recreate the aging inversion). Let's ensure correctness first. Link: https://lkml.kernel.org/r/20220518190911.82400-1-hannes@cmpxchg.org Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Yang Shi <shy828301@gmail.com> Acked-by: Roman Gushchin <roman.gushchin@linux.dev> Reviewed-by: "Huang, Ying" <ying.huang@intel.com> Reviewed-by: Muchun Song <songmuchun@bytedance.com> Acked-by: Michal Hocko <mhocko@suse.com> Acked-by: Shakeel Butt <shakeelb@google.com> Acked-by: Tim Chen <tim.c.chen@linux.intel.com> Cc: Zi Yan <ziy@nvidia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2022-05-25mm/kfence: print disabling or re-enabling messageJackie Liu1-1/+5
By printing information, we can friendly prompt the status change information of kfence by dmesg and record by syslog. Also, set kfence_enabled to false only when needed. Link: https://lkml.kernel.org/r/20220518073105.3160335-1-liu.yun@linux.dev Signed-off-by: Jackie Liu <liuyun01@kylinos.cn> Co-developed-by: Marco Elver <elver@google.com> Signed-off-by: Marco Elver <elver@google.com> Reviewed-by: Marco Elver <elver@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2022-05-25include/trace/events/percpu.h: cleanup for "percpu: improve ↵Vasily Averin1-2/+2
percpu_alloc_percpu event trace" Fix sparse warning about incorrect gfp_t cast. Link: https://lkml.kernel.org/r/001979f3-e978-0998-cbed-61a4a2ac87b8@openvz.org Fixes: f67bed134a05 ("percpu: improve percpu_alloc_percpu event trace") Signed-off-by: Vasily Averin <vvs@openvz.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2022-05-25include/trace/events/mmflags.h: cleanup for "tracing: incorrect gfp_t ↵Vasily Averin1-41/+43
conversion" Redefines __def_gfpflag_names array according to akpm@, willy@ and Joe Perches recommendations. Link: https://lkml.kernel.org/r/6f811e19-41c6-f3e8-fca6-23a19a62e313@openvz.org Fixes: fe573327ffb1 ("tracing: incorrect gfp_t conversion") Signed-off-by: Vasily Averin <vvs@openvz.org> Cc: Matthew Wilcox <willy@infradead.org> Cc: Joe Perches <joe@perches.com> Cc: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2022-05-25mm: fix a potential infinite loop in start_isolate_page_range()Zi Yan2-13/+46
In isolate_single_pageblock() called by start_isolate_page_range(), there are some pageblock isolation issues causing a potential infinite loop when isolating a page range. This is reported by Qian Cai. 1. the pageblock was isolated by just changing pageblock migratetype without checking unmovable pages. Calling set_migratetype_isolate() to isolate pageblock properly. 2. an off-by-one error caused migrating pages unnecessarily, since the page is not crossing pageblock boundary. 3. migrating a compound page across pageblock boundary then splitting the free page later has a small race window that the free page might be allocated again, so that the code will try again, causing an potential infinite loop. Temporarily set the to-be-migrated page's pageblock to MIGRATE_ISOLATE to prevent that and bail out early if no free page is found after page migration. An additional fix to split_free_page() aims to avoid crashing in __free_one_page(). When the free page is split at the specified split_pfn_offset, free_page_order should check both the first bit of free_page_pfn and the last bit of split_pfn_offset and use the smaller one. For example, if free_page_pfn=0x10000, split_pfn_offset=0xc000, free_page_order should first be 0x8000 then 0x4000, instead of 0x4000 then 0x8000, which the original algorithm did. [akpm@linux-foundation.org: suppress min() warning] Link: https://lkml.kernel.org/r/20220524194756.1698351-1-zi.yan@sent.com Fixes: b2c9e2fbba3253 ("mm: make alloc_contig_range work at pageblock granularity") Signed-off-by: Zi Yan <ziy@nvidia.com> Reported-by: Qian Cai <quic_qiancai@quicinc.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: David Hildenbrand <david@redhat.com> Cc: Eric Ren <renzhengeek@gmail.com> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Mike Rapoport <rppt@linux.ibm.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Oscar Salvador <osalvador@suse.de> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2022-05-25MAINTAINERS: add Muchun as co-maintainer for HugeTLBMuchun Song1-1/+5
I have been focusing on mm for the past two years. e.g. developing, fixing bugs, reviewing related to HugeTLB system. I would like to help Mike and other people working on HugeTLB by reviewing their work. When I first introduced the vmemmmap reduction, I forgot to update MAINTAINERS file. Let's update it as well. And rename "HUGETLB FILESYSTEM" to "HUGETLB SUBSYSTEM" since some files are not only related to filesystem but also memory management (the name of FILESYSTEM cannot cover this area). Link: https://lkml.kernel.org/r/20220521074103.79468-1-songmuchun@bytedance.com Signed-off-by: Muchun Song <songmuchun@bytedance.com> Acked-by: Mike Kravetz <mike.kravetz@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2022-05-25zram: fix Kconfig dependency warningRandy Dunlap1-1/+1
ZSMALLOC depends on MMU so ZRAM should also depend on MMU since 'select' does not follow any dependency chains. Fixes this Kconfig warning: WARNING: unmet direct dependencies detected for ZSMALLOC Depends on [n]: MMU [=n] Selected by [y]: - ZRAM [=y] && BLK_DEV [=y] && BLOCK [=y] && SYSFS [=y] && (CRYPTO_LZO [=y] || CRYPTO_ZSTD [=m] || CRYPTO_LZ4 [=m] || CRYPTO_LZ4HC [=n] || CRYPTO_842 [=n]) Link: https://lkml.kernel.org/r/20220522204027.22964-1-rdunlap@infradead.org Fixes: b3fbd58fcbb10 ("mm: Kconfig: simplify zswap configuration") Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Nitin Gupta <ngupta@vflare.org> Cc: Sergey Senozhatsky <senozhatsky@chromium.org> Cc: Jens Axboe <axboe@kernel.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2022-05-25mm/shmem: fix shmem folio swapoff hangHugh Dickins1-2/+1
Shmem swapoff makes no progress: the index to indices is not incremented. But "ret" is no longer a return value, so use folio_batch_count() instead. Link: https://lkml.kernel.org/r/c32bee8a-f0aa-245-f94e-24dd271924fa@google.com Fixes: da08e9b79323 ("mm/shmem: convert shmem_swapin_page() to shmem_swapin_folio()") Signed-off-by: Hugh Dickins <hughd@google.com> Reviewed-by: Miaohe Lin <linmiaohe@huawei.com> Tested-by: Miaohe Lin <linmiaohe@huawei.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2022-05-25cgroup: fix an error handling path in alloc_pagecache_max_30M()Christophe JAILLET1-1/+1
If the first goto is taken, 'fd' is not opened yet (and is un-initialized). So a direct return is safer. Link: https://lkml.kernel.org/r/628312312eb40e0e39463a2c06415fde5295c716.1653229120.git.christophe.jaillet@wanadoo.fr Fixes: c1a31a2f7a9c ("cgroup: fix racy check in alloc_pagecache_max_30M() helper function") Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Dan Carpenter <dan.carpenter@oracle.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Michal Hocko <mhocko@kernel.org> Cc: Roman Gushchin <roman.gushchin@linux.dev> Cc: Shakeel Butt <shakeelb@google.com> Cc: Muchun Song <songmuchun@bytedance.com> Cc: Tejun Heo <tj@kernel.org> Cc: Zefan Li <lizefan.x@bytedance.com> Cc: Shuah Khan <shuah@kernel.org> Cc: David Vernet <void@manifault.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2022-05-25Merge tag 'printk-for-5.19' of ↵Linus Torvalds15-321/+1174
git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux Pull printk updates from Petr Mladek: - Offload writing printk() messages on consoles to per-console kthreads. It prevents soft-lockups when an extensive amount of messages is printed. It was observed, for example, during boot of large systems with a lot of peripherals like disks or network interfaces. It prevents live-lockups that were observed, for example, when messages about allocation failures were reported and a CPU handled consoles instead of reclaiming the memory. It was hard to solve even with rate limiting because it would need to take into account the amount of messages and the speed of all consoles. It is a must to have for real time. Otherwise, any printk() might break latency guarantees. The per-console kthreads allow to handle each console on its own speed. Slow consoles do not longer slow down faster ones. And printk() does not longer unpredictably slows down various code paths. There are situations when the kthreads are either not available or not reliable, for example, early boot, suspend, or panic. In these situations, printk() uses the legacy mode and tries to handle consoles immediately. - Add documentation for the printk index. * tag 'printk-for-5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux: printk, tracing: fix console tracepoint printk: remove @console_locked printk: extend console_lock for per-console locking printk: add kthread console printers printk: add functions to prefer direct printing printk: add pr_flush() printk: move buffer definitions into console_emit_next_record() caller printk: refactor and rework printing logic printk: add con_printk() macro for console details printk: call boot_delay_msec() in printk_delay() printk: get caller_id/timestamp after migration disable printk: wake waiters for safe and NMI contexts printk: wake up all waiters printk: add missing memory barrier to wake_up_klogd() printk: cpu sync always disable interrupts printk: rename cpulock functions printk/index: Printk index feature documentation MAINTAINERS: Add printk indexing maintainers on mention of printk_index
2022-05-25Merge tag 'slab-for-5.19' of ↵Linus Torvalds14-143/+283
git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab Pull slab updates from Vlastimil Babka: - Conversion of slub_debug stack traces to stackdepot, allowing more useful debugfs-based inspection for e.g. memory leak debugging. Allocation and free debugfs info now includes full traces and is sorted by the unique trace frequency. The stackdepot conversion was already attempted last year but reverted by ae14c63a9f20. The memory overhead (while not actually enabled on boot) has been meanwhile solved by making the large stackdepot allocation dynamic. The xfstest issues haven't been reproduced on current kernel locally nor in -next, so the slab cache layout changes that originally made that bug manifest were probably not the root cause. - Refactoring of dma-kmalloc caches creation. - Trivial cleanups such as removal of unused parameters, fixes and clarifications of comments. - Hyeonggon Yoo joins as a reviewer. * tag 'slab-for-5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab: MAINTAINERS: add myself as reviewer for slab mm/slub: remove unused kmem_cache_order_objects max mm: slab: fix comment for __assume_kmalloc_alignment mm: slab: fix comment for ARCH_KMALLOC_MINALIGN mm/slub: remove unneeded return value of slab_pad_check mm/slab_common: move dma-kmalloc caches creation into new_kmalloc_cache() mm/slub: remove meaningless node check in ___slab_alloc() mm/slub: remove duplicate flag in allocate_slab() mm/slub: remove unused parameter in setup_object*() mm/slab.c: fix comments slab, documentation: add description of debugfs files for SLUB caches mm/slub: sort debugfs output by frequency of stack traces mm/slub: distinguish and print stack traces in debugfs files mm/slub: use stackdepot to save stack trace in objects mm/slub: move struct track init out of set_track() lib/stackdepot: allow requesting early initialization dynamically mm/slub, kunit: Make slub_kunit unaffected by user specified flags mm/slab: remove some unused functions
2022-05-25linux/types.h: reinstate "__bitwise__" macro for user space useLinus Torvalds1-0/+3
Commit c724c866bb70 ("linux/types.h: remove unnecessary __bitwise__") was right that there are no users of __bitwise__ in the kernel, but it turns out there are user space users of it that do expect it. It is, after all, in the uapi directory, so user space usage is to be expected. Instead of reverting the commit completely, let's just clarify the situation so that it doesn't happen again, and have some in-code explanations for why that "__bitwise__" still exists. Reported-by: Jiri Slaby <jirislaby@kernel.org> Cc: Bjorn Helgaas <helgaas@kernel.org> Link: https://lore.kernel.org/all/b5c0a68d-8387-4909-beea-f70ab9e6e3d5@kernel.org/ Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-05-25media: lirc: revert removal of unused feature flagsSean Young1-0/+7
Commit b2a90f4fcb14 ("media: lirc: remove unused lirc features") removed feature flags which were never implemented, but they are still used by the lirc daemon went built from source. Reinstate these symbols in order not to break the lirc build. Fixes: b2a90f4fcb14 ("media: lirc: remove unused lirc features") Link: https://lore.kernel.org/all/a0470450-ecfd-2918-e04a-7b57c1fd7694@kernel.org/ Reported-by: Jiri Slaby <jirislaby@kernel.org> Cc: Mauro Carvalho Chehab <mchehab@kernel.org> Signed-off-by: Sean Young <sean@mess.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-05-25ARM: ixp4xx: Consolidate Kconfig fixing issueLinus Walleij1-15/+4
The IXP4xx Kconfig we ended up with for mach-ixp4xx creates as kismet warning: WARNING: unmet direct dependencies detected for GPIO_IXP4XX Depends on [n]: GPIOLIB [=y] && HAS_IOMEM [=y] && ARCH_IXP4XX [=y] && OF [=n] Selected by [y]: - ARCH_IXP4XX [=y] && <choice> This is because it is possible to select ARCH_IXP4XX witout OF while that selects the GPIO driver that now depends on OF. Fix this by creating a single ARCH_IXP4XX kconfig that selects USE_OF. Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Imre Kaloz <kaloz@openwrt.org> Cc: Krzysztof Halasa <khalasa@piap.pl> Link: https://lore.kernel.org/r/20220522072356.34062-1-linus.walleij@linaro.org' Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2022-05-25KVM: x86: Fix the intel_pt PMI handling wrongly considered from guestYanfei Xu1-1/+1
When kernel handles the vm-exit caused by external interrupts and NMI, it always sets kvm_intr_type to tell if it's dealing an IRQ or NMI. For the PMI scenario, it could be IRQ or NMI. However, intel_pt PMIs are only generated for HARDWARE perf events, and HARDWARE events are always configured to generate NMIs. Use kvm_handling_nmi_from_guest() to precisely identify if the intel_pt PMI came from the guest; this avoids false positives if an intel_pt PMI/NMI arrives while the host is handling an unrelated IRQ VM-Exit. Fixes: db215756ae59 ("KVM: x86: More precisely identify NMI from guest when handling PMI") Signed-off-by: Yanfei Xu <yanfei.xu@intel.com> Message-Id: <20220523140821.1345605-1-yanfei.xu@intel.com> Cc: stable@vger.kernel.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-05-25KVM: selftests: x86: Sync the new name of the test case to .gitignoreLike Xu1-1/+1
Fixing side effect of the so-called opportunistic change in the commit. Fixes: dc8a9febbab0 ("KVM: selftests: x86: Fix test failure on arch lbr capable platforms") Signed-off-by: Like Xu <likexu@tencent.com> Message-Id: <20220518170118.66263-2-likexu@tencent.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-05-25Documentation: kvm: reorder ARM-specific section about KVM_SYSTEM_EVENT_SUSPENDPaolo Bonzini1-26/+26
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-05-25x86, kvm: use correct GFP flags for preemption disabledPaolo Bonzini1-1/+1
Commit ddd7ed842627 ("x86/kvm: Alloc dummy async #PF token outside of raw spinlock") leads to the following Smatch static checker warning: arch/x86/kernel/kvm.c:212 kvm_async_pf_task_wake() warn: sleeping in atomic context arch/x86/kernel/kvm.c 202 raw_spin_lock(&b->lock); 203 n = _find_apf_task(b, token); 204 if (!n) { 205 /* 206 * Async #PF not yet handled, add a dummy entry for the token. 207 * Allocating the token must be down outside of the raw lock 208 * as the allocator is preemptible on PREEMPT_RT kernels. 209 */ 210 if (!dummy) { 211 raw_spin_unlock(&b->lock); --> 212 dummy = kzalloc(sizeof(*dummy), GFP_KERNEL); ^^^^^^^^^^ Smatch thinks the caller has preempt disabled. The `smdb.py preempt kvm_async_pf_task_wake` output call tree is: sysvec_kvm_asyncpf_interrupt() <- disables preempt -> __sysvec_kvm_asyncpf_interrupt() -> kvm_async_pf_task_wake() The caller is this: arch/x86/kernel/kvm.c 290 DEFINE_IDTENTRY_SYSVEC(sysvec_kvm_asyncpf_interrupt) 291 { 292 struct pt_regs *old_regs = set_irq_regs(regs); 293 u32 token; 294 295 ack_APIC_irq(); 296 297 inc_irq_stat(irq_hv_callback_count); 298 299 if (__this_cpu_read(apf_reason.enabled)) { 300 token = __this_cpu_read(apf_reason.token); 301 kvm_async_pf_task_wake(token); 302 __this_cpu_write(apf_reason.token, 0); 303 wrmsrl(MSR_KVM_ASYNC_PF_ACK, 1); 304 } 305 306 set_irq_regs(old_regs); 307 } The DEFINE_IDTENTRY_SYSVEC() is a wrapper that calls this function from the call_on_irqstack_cond(). It's inside the call_on_irqstack_cond() where preempt is disabled (unless it's already disabled). The irq_enter/exit_rcu() functions disable/enable preempt. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Cc: stable@vger.kernel.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-05-25KVM: LAPIC: Drop pending LAPIC timer injection when canceling the timerWanpeng Li1-0/+1
The timer is disarmed when switching between TSC deadline and other modes; however, the pending timer is still in-flight, so let's accurately remove any traces of the previous mode. Fixes: 4427593258 ("KVM: x86: thoroughly disarm LAPIC timer around TSC deadline switch") Signed-off-by: Wanpeng Li <wanpengli@tencent.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-05-25x86/kvm: Alloc dummy async #PF token outside of raw spinlockSean Christopherson1-14/+27
Drop the raw spinlock in kvm_async_pf_task_wake() before allocating the the dummy async #PF token, the allocator is preemptible on PREEMPT_RT kernels and must not be called from truly atomic contexts. Opportunistically document why it's ok to loop on allocation failure, i.e. why the function won't get stuck in an infinite loop. Reported-by: Yajun Deng <yajun.deng@linux.dev> Cc: stable@vger.kernel.org Signed-off-by: Sean Christopherson <seanjc@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-05-25KVM: x86: avoid calling x86 emulator without a decoded instructionSean Christopherson1-12/+19
Whenever x86_decode_emulated_instruction() detects a breakpoint, it returns the value that kvm_vcpu_check_breakpoint() writes into its pass-by-reference second argument. Unfortunately this is completely bogus because the expected outcome of x86_decode_emulated_instruction is an EMULATION_* value. Then, if kvm_vcpu_check_breakpoint() does "*r = 0" (corresponding to a KVM_EXIT_DEBUG userspace exit), it is misunderstood as EMULATION_OK and x86_emulate_instruction() is called without having decoded the instruction. This causes various havoc from running with a stale emulation context. The fix is to move the call to kvm_vcpu_check_breakpoint() where it was before commit 4aa2691dcbd3 ("KVM: x86: Factor out x86 instruction emulation with decoding") introduced x86_decode_emulated_instruction(). The other caller of the function does not need breakpoint checks, because it is invoked as part of a vmexit and the processor has already checked those before executing the instruction that #GP'd. This fixes CVE-2022-1852. Reported-by: Qiuhao Li <qiuhao@sysec.org> Reported-by: Gaoning Pan <pgn@zju.edu.cn> Reported-by: Yongkang Jia <kangel@zju.edu.cn> Fixes: 4aa2691dcbd3 ("KVM: x86: Factor out x86 instruction emulation with decoding") Cc: stable@vger.kernel.org Signed-off-by: Sean Christopherson <seanjc@google.com> Message-Id: <20220311032801.3467418-2-seanjc@google.com> [Rewrote commit message according to Qiuhao's report, since a patch already existed to fix the bug. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-05-25KVM: SVM: Use kzalloc for sev ioctl interfaces to prevent kernel data leakAshish Kalra1-6/+6
For some sev ioctl interfaces, the length parameter that is passed maybe less than or equal to SEV_FW_BLOB_MAX_SIZE, but larger than the data that PSP firmware returns. In this case, kmalloc will allocate memory that is the size of the input rather than the size of the data. Since PSP firmware doesn't fully overwrite the allocated buffer, these sev ioctl interface may return uninitialized kernel slab memory. Reported-by: Andy Nguyen <theflow@google.com> Suggested-by: David Rientjes <rientjes@google.com> Suggested-by: Peter Gonda <pgonda@google.com> Cc: kvm@vger.kernel.org Cc: stable@vger.kernel.org Cc: linux-kernel@vger.kernel.org Fixes: eaf78265a4ab3 ("KVM: SVM: Move SEV code to separate file") Fixes: 2c07ded06427d ("KVM: SVM: add support for SEV attestation command") Fixes: 4cfdd47d6d95a ("KVM: SVM: Add KVM_SEV SEND_START command") Fixes: d3d1af85e2c75 ("KVM: SVM: Add KVM_SEND_UPDATE_DATA command") Fixes: eba04b20e4861 ("KVM: x86: Account a variety of miscellaneous allocations") Signed-off-by: Ashish Kalra <ashish.kalra@amd.com> Reviewed-by: Peter Gonda <pgonda@google.com> Message-Id: <20220516154310.3685678-1-Ashish.Kalra@amd.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-05-25x86/fpu: KVM: Set the base guest FPU uABI size to sizeof(struct kvm_xsave)Sean Christopherson1-1/+16
Set the starting uABI size of KVM's guest FPU to 'struct kvm_xsave', i.e. to KVM's historical uABI size. When saving FPU state for usersapce, KVM (well, now the FPU) sets the FP+SSE bits in the XSAVE header even if the host doesn't support XSAVE. Setting the XSAVE header allows the VM to be migrated to a host that does support XSAVE without the new host having to handle FPU state that may or may not be compatible with XSAVE. Setting the uABI size to the host's default size results in out-of-bounds writes (setting the FP+SSE bits) and data corruption (that is thankfully caught by KASAN) when running on hosts without XSAVE, e.g. on Core2 CPUs. WARN if the default size is larger than KVM's historical uABI size; all features that can push the FPU size beyond the historical size must be opt-in. ================================================================== BUG: KASAN: slab-out-of-bounds in fpu_copy_uabi_to_guest_fpstate+0x86/0x130 Read of size 8 at addr ffff888011e33a00 by task qemu-build/681 CPU: 1 PID: 681 Comm: qemu-build Not tainted 5.18.0-rc5-KASAN-amd64 #1 Hardware name: /DG35EC, BIOS ECG3510M.86A.0118.2010.0113.1426 01/13/2010 Call Trace: <TASK> dump_stack_lvl+0x34/0x45 print_report.cold+0x45/0x575 kasan_report+0x9b/0xd0 fpu_copy_uabi_to_guest_fpstate+0x86/0x130 kvm_arch_vcpu_ioctl+0x72a/0x1c50 [kvm] kvm_vcpu_ioctl+0x47f/0x7b0 [kvm] __x64_sys_ioctl+0x5de/0xc90 do_syscall_64+0x31/0x50 entry_SYSCALL_64_after_hwframe+0x44/0xae </TASK> Allocated by task 0: (stack is not available) The buggy address belongs to the object at ffff888011e33800 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 0 bytes to the right of 512-byte region [ffff888011e33800, ffff888011e33a00) The buggy address belongs to the physical page: page:0000000089cd4adb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11e30 head:0000000089cd4adb order:2 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 dead000000000100 dead000000000122 ffff888001041c80 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888011e33900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888011e33980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888011e33a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888011e33a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888011e33b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== Disabling lock debugging due to kernel taint Fixes: be50b2065dfa ("kvm: x86: Add support for getting/setting expanded xstate buffer") Fixes: c60427dd50ba ("x86/fpu: Add uabi_size to guest_fpu") Reported-by: Zdenek Kaspar <zkaspar82@gmail.com> Cc: Maciej S. Szmigiero <mail@maciej.szmigiero.name> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: kvm@vger.kernel.org Cc: stable@vger.kernel.org Signed-off-by: Sean Christopherson <seanjc@google.com> Tested-by: Zdenek Kaspar <zkaspar82@gmail.com> Message-Id: <20220504001219.983513-1-seanjc@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-05-25s390/uv_uapi: depend on CONFIG_S390Paolo Bonzini1-0/+1
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-05-25Merge tag 'kvm-s390-next-5.19-1' of ↵Paolo Bonzini14-6/+714
git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD KVM: s390: Fix and feature for 5.19 - ultravisor communication device driver - fix TEID on terminating storage key ops
2022-05-25Merge tag 'kvm-riscv-5.19-1' of https://github.com/kvm-riscv/linux into HEADPaolo Bonzini386-1842/+4225
KVM/riscv changes for 5.19 - Added Sv57x4 support for G-stage page table - Added range based local HFENCE functions - Added remote HFENCE functions based on VCPU requests - Added ISA extension registers in ONE_REG interface - Updated KVM RISC-V maintainers entry to cover selftests support
2022-05-25Merge tag 'kvmarm-5.19' of ↵Paolo Bonzini1425-9765/+17240
git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD KVM/arm64 updates for 5.19 - Add support for the ARMv8.6 WFxT extension - Guard pages for the EL2 stacks - Trap and emulate AArch32 ID registers to hide unsupported features - Ability to select and save/restore the set of hypercalls exposed to the guest - Support for PSCI-initiated suspend in collaboration with userspace - GICv3 register-based LPI invalidation support - Move host PMU event merging into the vcpu data structure - GICv3 ITS save/restore fixes - The usual set of small-scale cleanups and fixes [Due to the conflict, KVM_SYSTEM_EVENT_SEV_TERM is relocated from 4 to 6. - Paolo]
2022-05-25KVM: selftests: x86: Fix test failure on arch lbr capable platformsYang Weijiang2-9/+11
On Arch LBR capable platforms, LBR_FMT in perf capability msr is 0x3f, so the last format test will fail. Use a true invalid format(0x30) for the test if it's running on these platforms. Opportunistically change the file name to reflect the tests actually carried out. Suggested-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Yang Weijiang <weijiang.yang@intel.com> Message-Id: <20220512084046.105479-1-weijiang.yang@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-05-25KVM: LAPIC: Trace LAPIC timer expiration on every vmentryWanpeng Li3-11/+2
In commit ec0671d5684a ("KVM: LAPIC: Delay trace_kvm_wait_lapic_expire tracepoint to after vmexit", 2019-06-04), trace_kvm_wait_lapic_expire was moved after guest_exit_irqoff() because invoking tracepoints within kvm_guest_enter/kvm_guest_exit caused a lockdep splat. These days this is not necessary, because commit 87fa7f3e98a1 ("x86/kvm: Move context tracking where it belongs", 2020-07-09) restricted the RCU extended quiescent state to be closer to vmentry/vmexit. Moving the tracepoint back to __kvm_wait_lapic_expire is more accurate, because it will be reported even if vcpu_enter_guest causes multiple vmentries via the IPI/Timer fast paths, and it allows the removal of advance_expire_delta. Signed-off-by: Wanpeng Li <wanpengli@tencent.com> Message-Id: <1650961551-38390-1-git-send-email-wanpengli@tencent.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-05-25Merge tag 'folio-5.19' of git://git.infradead.org/users/willy/pagecacheLinus Torvalds161-1221/+1233
Pull page cache updates from Matthew Wilcox: - Appoint myself page cache maintainer - Fix how scsicam uses the page cache - Use the memalloc_nofs_save() API to replace AOP_FLAG_NOFS - Remove the AOP flags entirely - Remove pagecache_write_begin() and pagecache_write_end() - Documentation updates - Convert several address_space operations to use folios: - is_dirty_writeback - readpage becomes read_folio - releasepage becomes release_folio - freepage becomes free_folio - Change filler_t to require a struct file pointer be the first argument like ->read_folio * tag 'folio-5.19' of git://git.infradead.org/users/willy/pagecache: (107 commits) nilfs2: Fix some kernel-doc comments Appoint myself page cache maintainer fs: Remove aops->freepage secretmem: Convert to free_folio nfs: Convert to free_folio orangefs: Convert to free_folio fs: Add free_folio address space operation fs: Convert drop_buffers() to use a folio fs: Change try_to_free_buffers() to take a folio jbd2: Convert release_buffer_page() to use a folio jbd2: Convert jbd2_journal_try_to_free_buffers to take a folio reiserfs: Convert release_buffer_page() to use a folio fs: Remove last vestiges of releasepage ubifs: Convert to release_folio reiserfs: Convert to release_folio orangefs: Convert to release_folio ocfs2: Convert to release_folio nilfs2: Remove comment about releasepage nfs: Convert to release_folio jfs: Convert to release_folio ...
2022-05-25Merge tag 'iomap-5.19-merge-2' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linuxLinus Torvalds2-6/+4
Pull iomap updates from Darrick Wong: "There's a couple of corrections sent in by Andreas for some accounting errors. The biggest change this time around is that writeback errors longer clear pageuptodate nor does XFS invalidate the page cache anymore. This brings XFS (and gfs2/zonefs) behavior in line with every other Linux filesystem driver, and fixes some UAF bugs that only cropped up after willy turned on multipage folios for XFS in 5.18-rc1. Regrettably, it took all the way to the end of the 5.18 cycle to find the source of these bugs and reach a consensus that XFS' writeback failure behavior from 20 years ago is no longer necessary. Summary: - Fix a couple of accounting errors in the buffered io code. - Discontinue the practice of marking folios !uptodate and invalidating them when writeback fails. This fixes some UAF bugs when multipage folios are enabled, and brings the behavior of XFS/gfs/zonefs into alignment with the behavior of all the other Linux filesystems" * tag 'iomap-5.19-merge-2' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux: iomap: don't invalidate folios after writeback errors iomap: iomap_write_end cleanup iomap: iomap_write_failed fix
2022-05-25Merge tag 'dlm-5.19' of ↵Linus Torvalds15-669/+633
git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm Pull dlm updates from David Teigland: "This includes several large patches to improve endian handling and remove sparse warnings. The code previously used in/out, in-place endianness conversion functions. Other code cleanup includes the list iterator changes. Finally, a long standing bug was found and fixed, caused by missed decrement on an lock struct ref count" * tag 'dlm-5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm: (28 commits) dlm: use kref_put_lock in __put_lkb dlm: use kref_put_lock in put_rsb dlm: remove unnecessary error assign dlm: fix missing lkb refcount handling fs: dlm: cast resource pointer to uintptr_t dlm: replace usage of found with dedicated list iterator variable dlm: remove usage of list iterator for list_add() after the loop body dlm: fix pending remove if msg allocation fails dlm: fix wake_up() calls for pending remove dlm: check required context while close dlm: cleanup lock handling in dlm_master_lookup dlm: remove found label in dlm_master_lookup dlm: remove __user conversion warnings dlm: move conversion to compile time dlm: use __le types for dlm messages dlm: use __le types for rcom messages dlm: use __le types for dlm header dlm: use __le types for options header dlm: add __CHECKER__ for false positives dlm: move global to static inits ...
2022-05-25Merge tag 'ext4_for_linus' of ↵Linus Torvalds14-429/+564
git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 Pull ext4 updates from Ted Ts'o: "Various bug fixes and cleanups for ext4. In particular, move the crypto related fucntions from fs/ext4/super.c into a new fs/ext4/crypto.c, and fix a number of bugs found by fuzzers and error injection tools" * tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (25 commits) ext4: only allow test_dummy_encryption when supported ext4: fix bug_on in __es_tree_search ext4: avoid cycles in directory h-tree ext4: verify dir block before splitting it ext4: filter out EXT4_FC_REPLAY from on-disk superblock field s_state ext4: fix bug_on in ext4_writepages ext4: refactor and move ext4_ioctl_get_encryption_pwsalt() ext4: cleanup function defs from ext4.h into crypto.c ext4: move ext4 crypto code to its own file crypto.c ext4: fix memory leak in parse_apply_sb_mount_options() ext4: reject the 'commit' option on ext2 filesystems ext4: remove duplicated #include of dax.h in inode.c ext4: fix race condition between ext4_write and ext4_convert_inline_data ext4: convert symlink external data block mapping to bdev ext4: add nowait mode for ext4_getblk() ext4: fix journal_ioprio mount option handling ext4: mark group as trimmed only if it was fully scanned ext4: fix use-after-free in ext4_rename_dir_prepare ext4: add unmount filesystem message ext4: remove unnecessary conditionals ...
2022-05-25Merge tag 'drm-intel-next-fixes-2022-05-24' of ↵Dave Airlie11-51/+63
git://anongit.freedesktop.org/drm/drm-intel into drm-next drm/i915 fixes for v5.19 merge window: - Build, sparse, UB, and CFI fixes - Variable scope fix - Audio pipe logging fix - ICL+ DSI NULL dereference fix Signed-off-by: Dave Airlie <airlied@redhat.com> From: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/87sfozuj44.fsf@intel.com
2022-05-25Merge tag 'gfs2-v5.18-rc6-fixes' of ↵Linus Torvalds8-66/+91
git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2 Pull gfs2 updates from Andreas Gruenbacher: - Clean up the allocation of glocks that have an address space attached - Quota locking fix and quota iomap conversion - Fix the FITRIM error reporting - Some list iterator cleanups * tag 'gfs2-v5.18-rc6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2: gfs2: Convert function bh_get to use iomap gfs2: use i_lock spin_lock for inode qadata gfs2: Return more useful errors from gfs2_rgrp_send_discards() gfs2: Use container_of() for gfs2_glock(aspace) gfs2: Explain some direct I/O oddities gfs2: replace 'found' with dedicated list iterator variable
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